正则表达式替换匹配

Question

I'm having some issues with a Json deserializer. One of the values in the returned Json is to large and is throwing exceptions. I actually do not need the info that it is returning so I want to ignore it. I figured the best way to do this would be to search the json string for the attribute, then set the value to null.

Here's a sample of the returned Json that is giving me the error.

           "attributes": [
                {
                    "defindex": 143,
                    "value": 2111522248,
                    "float_value": 364329070052570260000000000000
                },

I would like to replace the "float_value" attribute(Ie. 36432907005257026000000000 ) with an empty value, or nill, so that it does not throw the exception during Json Deserialization.

I'm using Regex.Replace(json, "\\"float_value\\": \\\\d+", String.Empty);

But it doesn't appear to be removing it, and is still throwing the exception.

Answer 1

When you say \\\\d+ you're actually escaping the second \\ , and not indicating that you want a \\d . Try this instead:

 
 
 
  
  Regex.Replace(json, "\\"float_value\\": \\d+", String.Empty);
 
  

Here's a breakdown of what you had before. Note the literal d : http://www.regex101.com/r/wQ6jD5

Edit: Nvm, this doesn't apply since you were using a normal string rather than a verbatim string. As Jj' indicated, I think the problem is that you have a , on the previous line which you didn't remove.